Beyonce at the Super Bowl: Musically “serviceable” but physically, um, wow, says music critic Chris Richards. Update: Our dance critic Sarah Kaufman weighs in on Beyonce. “Something we’d never seen before from this ordinarily cool, controlled diva came out in New Orleans: a raging, full-bore athleticism. . .Did you see her sink to her knees and rise up again in those heels, sans thigh cramps?”